<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>逻辑运算小练习</title>
</head>
<body>
    <script>
        //逻辑运算符小练习
        // 与运算 两个都是true 结果为true
        //或运算   有一个为true 则为true
        //非   相反
        var num = 7;
        var str = "我爱你~中国~";

        console.log(num > 5 && str.length >= num); // ture 

        console.log(num < 5 && str.length >= num); // false

        console.log(!(num < 10)); // false

        console.log(!(num < 10 || str.length == num)); // false
    </script>
</body>
</html>